I'm a little confused, I think I may not have been clear?
If I type 'SPACE, A, B' I get a different result from typing 'A, B, ctrl-A, SPACE'. In both cases, the text in Alfred ends up being 'SPACE, A, B' (i.e. " AB")
These are the same exact characters, but in one case you get a file search and in the other case you don't. That's what seems like a bug to me! Any other text change seems to do the right thing, just that one acts funky.
EDIT: Reading again, now I understand. But it still seems like non-ideal behaviour. Typing space at the start of an Alfred query can have no other meaning other than wanting to do a file filter that I can tell. I was hoping to retrain my muscle memory, but it still hasn't worked 🤷♂️.. I doubt I'm the only one!
I'm also not sure how to create a hotkey that changes the alfred output (vs. one that impacts apps). I assume that should be possible though if I'm understanding correctly.